Ascites fluid characteristics can provide clues to the underlying cause. Bloody or milky fluid suggests trauma, malignancy or tuberculosis. Turbid fluid may indicate infection while straw colored fluid often has more benign causes. A neutrophil count over 250/mm3 points to peritonitis, and a total protein over 2.5 g/dL suggests conditions like heart failure or cancer while under 2.5 g/dL implies cirrhosis or nephrotic syndrome. A SAAG over 1.1 g/dL indicates portal hypertension from issues like cirrhosis or Budd-Chiari syndrome, while below 1.1 g/dL the absence of portal hypertension may suggest tuberculosis, cancer or other conditions.